Friction reproducing attachment for phonographs.



PATENTED 0011.8, 1907.

A. N. PIERMAN. I FRICTION RBPRODUGING ATTACHMENT FORPHONOGRAPHS.

APBLIOATION rignn MAE'.13, 1905.

6 SHEETS-SHEET 1.

No, 867,597. P'ATENTED OCT. s, 1907.

N''PIERMAN. FRICTION BBPRODUGING ATTACHMENT FOR PHONOGRAPHS'.

APPLIO ATION FILED M-AR.13. 1905.

6 SHEETS-SHEET 5.

Att est: Q Inventor:

/9@/ .0476! b 1 O I I 0:; g r .3 i wwe z Atty- PATENTED vOCT. 8, 71907.

- A. N. PIBRMAN. v

FRICTION REPRODUGING ATTACHMENT 130R PHONOGRAPHS.

APPLICATION nun MAR.13, robs.

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I. Will "IIIIIHHHH J O O Inventor Attest."

' V v j -j f .bya UNITED sTATEs-PATE ToFFIoE:

ALEXANDER N. PIERMAN, OF NEWARK, .NEW JERSEY, ASSIGNOR TO NEW JERSEY PATENT COMPANY, OF WEST ORANGE, NEW JERSEY, A OOBPORATIONOF NEW JERSEY.

Specification of Letters Patent.

Patented 0017.8,1907.

Application filed March 13,1905. Serial No. 249,687.

To all whom it may concern:

Be it known that I, ALEXANDER N. PIERM-AN, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, liave'invented certain new and useful Improvements in Friction Reproducing Attachments for. Phonographs, of which the following is a specification.

My invention relates to sound reproducing devices of the type wherein the diaphragm is vibrated by means of a friction shoe engaging a continuously rotating friction wheel, the friction betweenthe friction shoe and friction wheel being varied by varying the pressure of the friction shoe on the friction wheel, such variation in pressure being effected either directly or indirectly by the sounds to be reproduced. Devices of this type are well known and have been suggested for effecting the reproduction of ordinary sounds either directly as in the case of nicgaphones or indirectly as in the case of telephones or phonographs. The suggestion has also been made of actuatingthe friction block by means of levers, in order that the friction may be'increased and thereby permit the reproduced sounds to be augrnented. Examples 'ofthese suggestions are found in British patents to Hope-J ones No. 15,245 of 1890 and to St George No. 3473.015 1880.

'My invention relates to improvements in apparatus of this type in its application to phonographs and allied talking machines, and rny object is to provide an attachment for the purpose which can be readily applied to a phonograph at small cost and without interfering with the effective operation of the same.

The invention has particular reference to the means whereby the .friction wheel may be continuously ro-. tated while at the same time the friction wheel and parts cooperatingtherewith may be progressed longitudirially with respect to the record; also to the means for varying the leverage between the reproducing stylus and the friction shoe and further details of construction and operation, as'will be more fully hercinafter de-' scribed and claimed.

In order that the invention may be better understood,

I tention is directed to the accompanying drawings .c 'ming a part of this specification and in'which- Figurel is a plan ,view, showing in full lines my imphragmbox, Fig. 6 a side elevation of the attachment showing the reproducer stylus in engagement with the record, Fig. 7 a side elevation similar to Fig. 6, viewing the attachment from the opposite side, and, Fig. '8 a front elevation of the attachment.

.ducer stylus 7 engaging the record 8. A support 9 In all. the above views corresponding parts are represented by the same numerals of reference. I

Broadly speaking, the invention consists of two parts, first, operating mechanism permanently applied to thetalking machine but in no way interfering with the ordinary operation thereof when desired; and second, friction reproducing mechanism removably carried by the arm which sustains the ordinary reprodu'cer, so as to be'readily taken off when the ordinary reproducer is to be used, said friction reproducing mechanism co6perating with the operating mechanism, so as to continuously 6 5 rotate the friction wheelas the reproducer progresses longitudinally with respect to the record.

The. phonograph illustrated in Figs. land 2 is of such common construction and the partsthereof areso well known to persons skilled in the art, that a description'thereof is unnecessary. I arrange at the front of the instrument a fluted or pinion shaft-1 mounted in suitable and driven from the main shaft of the phonograph in any suitable way, as by gears 3-3. Removably carried in the usual- 'supporting arm like the ordinaify reproducer, is a cylindrical casing 4, to the underside ofwhich is pivoted the usual floating weight 5. Pivoted on. this floating weight is'a small lever 6 carrying the reproextends up from the casing 4-and carries a disk 10, opposing which is a corresponding disk 11 formed with aneck 12, to which the usual horn is applied. iThe disks 10 and 11 are clamped together by screws to hold the large diaphragm 14 in place between 'the washers 15, as will be understood. The support 9 carries a bearing 16, in which .is mounted a shaft 17 carrying the friction wheel 18, the latter being made of terial to increase the friction with the friction wheel: 100

A pivoted link 22 con ects the extension 21 of the. friction shoe with the diaphragm 14. The friction shoe 20' is provided with finger 23 connected to the pivoted adjusting lever 24 by means of a spring 25. V The lever 24 is mounted on the support 9 and is ad- 10;

justed by a screw 26, whereby the tension of the spring 25'may be varied to regulate the initial pressure of the friction shoe on the: friction wheel?" Engaging the mounted a-spur gear 31 adapted tomesh with the pinion shaft 1, so as to berotated .by the latter. At the same time, the spur gearmayumove longitudinally of the pinion shaft as the reproducer stylus tracks the.

record. The friction wheel 18 is rotated from the gear 31 in any suitable way, as for example, by a gear 32 on the shaft 17, meshing with said ,g ear wheel 31. It

will be evident that in applying my attachment to a -phonograph or other talking machine, the only permanent attachment to the talking machine is the pinion shaft 1 and its driving mechanism, but this does not in any way interfere with the operation of the talking 20 machine or detract from the appearance thereof The rest of the device is applied to the usual holding arm in the same way as the ordinary reproducer, and can be removed as readily. Furthermore, in raising or lowering the holding arm to lift the reproducer stylus from or engage it with the recprd, the spur gear 31 will be simultaneously raised from or lowered into engagement with the pinion shaft 1. In otherwords, the

friction wheel is not rotated except when the reproducer 'is in engagementwith the record, thereby reducing wear on the parts and preventing the transmission of noises, resulting from the rotation of the frictionwheeL In operation the screw 26 will be adjustedso as to secure the desired initial pressure between the friction shoe 20 and the friction wheel, and 35 a record having been placed on the usual mandrel oi the phonograph, the holding arm will be lowered so as to engage the reproducing stylus with the record, and simultaneously engage the spur gear 31 with the rotating pinion shaft 1. The friction wheel rotating respondingly varied, to thereby vibrate the diaphragm 14 with the desired amplification but in accordance with the record.

' Having now describedmy invention, what I claim as new therein and desire to secure by Letters Patent is:

1. In a. friction reproducing attachment for, phonographs and allied talking machines, the combination with producing means movable longitudinally of the record to be reproduced and a gearcooperating with the friction reproducing means and meshing continuously with said shaft, as and for the purposes set tort-11'.

2. In a 'friction reproducing attachmentfior phonographs and allied talking machines, the combination with a pinion shaft mounted in fixed beatings, of a supportmovable longitudinally of the record, a friction wheel carried by said support, friction reproducing devices operated by said wheel and agear fox-driving said wheel and meshing with said shaft, substantially as' set forth.

3. In a phonograph or allied talking machine, the combination-with the feed screw, feed nut, guide rod and traveling carriage sleeved thereon, of reproducing menus comprising 31 friction wheel carried by said carriage, means carried by the frame for drivingsaid friction wheel, the arrangement of parts being sucli that the raising of the carriage vdisconnects the friction wheel from its said driving means, substantially as set forth.

4. The combination with a talkiingqnachine and a relay-device therefor coniprising a reproduccr and the relatively stationary part of the relay'device proper, the

' relatively movable part of said relay device, and a dctachable bracket carrying meansfor rotating said movable part.

This specification signed and witnessed this 10th day of March 1905.

ALEXANDER N. PIERMAN.

Witnesses DnLos HOLDEN, ANNA R. KLnnM.

'tion between the friction shoe and wheel will be cora pinion shaft mounted in fixed bearings, of friction rc- 

